1222815867 has 16 divisors (see below), whose sum is σ = 2006672640. Its totient is φ = 645001632.

The previous prime is 1222815859. The next prime is 1222815877. The reversal of 1222815867 is 7685182221.

It is not a de Polignac number, because 1222815867 - 2³ = 1222815859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222815877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2239317 + ... + 2239862.

It is an arithmetic number, because the mean of its divisors is an integer number (125417040).

Almost surely, 2^1222815867 is an apocalyptic number.

1222815867 is a deficient number, since it is larger than the sum of its proper divisors (783856773).

1222815867 is a wasteful number, since it uses less digits than its factorization.

1222815867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4479202.

The product of its digits is 107520, while the sum is 42.

The square root of 1222815867 is about 34968.7841796080. The cubic root of 1222815867 is about 1069.3511852533.

The spelling of 1222815867 in words is "one billion, two hundred twenty-two million, eight hundred fifteen thousand, eight hundred sixty-seven".